CN1693837A - Magnetic displacement sensor - Google Patents
Magnetic displacement sensor Download PDFInfo
- Publication number
- CN1693837A CN1693837A CNA2005100402689A CN200510040268A CN1693837A CN 1693837 A CN1693837 A CN 1693837A CN A2005100402689 A CNA2005100402689 A CN A2005100402689A CN 200510040268 A CN200510040268 A CN 200510040268A CN 1693837 A CN1693837 A CN 1693837A
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- China
- Prior art keywords
- magnetic
- sensor
- displacement sensor
- flux density
- testee
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000005291 magnetic effect Effects 0.000 title claims abstract description 44
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 21
- 230000004907 flux Effects 0.000 claims abstract description 11
- 239000004020 conductor Substances 0.000 claims description 14
- 238000005259 measurement Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 abstract description 6
- 239000008151 electrolyte solution Substances 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
The invention relates to a magnetic displacement sensor. It is made up of two permanent magnets, and magnetic flux density measuring component. It forms a circuit with the measured material. The distance information would be measured by measure the magnetic flux density in the clearance between the measuring sensor and the measured material. The invention is simple structure, high accuracy, and has no special request to isolate material.
Description
Technical field
Magnetic displacement sensor of the present invention belongs to displacement transducer.
Background technology
Common in the market non-contact displacement sensor has: eddy current displacement sensor, capacitance displacement sensor, optical displacement sensor etc., though these several sensor precision are higher, but the common drawback of these several sensors is that the material between sensor and the measured object is had specific (special) requirements, as: can not be intercepted by conductor or ferromagnetic material between current vortex and capacitance displacement sensor requirement and the measured object, can not be isolated by nontransparent material between optical displacement sensor requirement and the measured object.This does not have ability measurement with regard to meaning these sensors to the measured object of being isolated by nontransparent electrolyte solution, and in the pump series products, all need measure across nontransparent electrolyte solution under a lot of situations.And the structure of these sensors is mostly complicated.
The objective of the invention is to the present situation at prior art, a kind of precision height is provided, not needing has specific (special) requirements and simple in structure, cheap displacement transducer to the isolated substance between sensor and the measured object.
The composition of realizing the magnetic displacement sensor of above-mentioned purpose is, permanent magnet is contained in the magnetic circuit that constitutes ∏ shape structure between a magnetic conductor and another piece magnetic conductor, and constitute magnetic loop with testee, the magnetic flux density measuring sensor is placed in one in the measurement air gap between a magnetic conductor end and the testee.
This magnetic displacement sensor is by measuring the magnetic flux density at air gap place between this sensor and the testee, obtaining the range information between testee and the sensor.
The principal feature of this magnetic displacement sensor is, simple in structure, precision is higher, and the spacer between sensor and the measured object does not have specific (special) requirements.
Description of drawings
Fig. 1 is the structural drawing of magnetic displacement sensor.
1-testee, 2-magnetic flux density measuring sensor, 3-magnetic conductor, 4-permanent magnet, 5-magnetic conductor
Fig. 2 is the magnetic line of force distribution plan of magnetic displacement sensor.
Fig. 3 is this magnetic displacement sensor difference usage example figure.
Embodiment
As shown in Figure 1, this magnetic displacement sensor is simple in structure.Permanent magnet 4 is contained in and constitutes ∏ shape structure magnetic circuit between a magnetic conductor 3 and another piece magnetic conductor 5, and testee places two magnetic conductor ends and two magnetic conductors to constitute magnetic loop.Magnetic flux density measuring sensor 2 is placed in one in the measurement air gap between a magnetic conductor end and the testee.
Fig. 2 is the magnetic line of force distribution plan of the magnetic displacement sensor that obtains by finite element analysis.The magnetic line of force distribution plan of left figure and right figure in the comparison diagram 2, as measured object (b) figure when sensor is closer, the magnetic flux density at place, magnetic flux density measuring sensor position is just more intense, otherwise (a) schemes as can be seen, and then magnetic flux density is more weak.So, just can obtain the range information between measured object and the sensor by the magnetic flux density at air gap place between survey sensor and the measured object.
This sensor can difference use to improve performance, is divided into two pairs as 4 sensors among Fig. 3, respectively the distance of difference measurement X, Y.
The characteristics of this sensor are simple in structure, and precision is higher, and sensor and measured object can be by non-ferromagnetic materials Isolation, but measured object can only be the higher material of magnetic conductivity. This sensor has in the pump series products widely should Use prospect.
Claims (1)
1, a kind of magnetic displacement sensor, it is characterized in that, permanent magnet (4) is contained in the magnetic circuit that constitutes ∏ shape structure between a magnetic conductor (3) and another piece magnetic conductor (5), and constitute magnetic loop with testee (1), magnetic flux density measuring sensor (2) places the measurement air gap between magnetic conductor end and the testee (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100402689A CN1693837A (en) | 2005-05-27 | 2005-05-27 | Magnetic displacement sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2005100402689A CN1693837A (en) | 2005-05-27 | 2005-05-27 | Magnetic displacement sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1693837A true CN1693837A (en) | 2005-11-09 |
Family
ID=35352912
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005100402689A Pending CN1693837A (en) | 2005-05-27 | 2005-05-27 | Magnetic displacement sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1693837A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707245A (en) * | 2011-03-28 | 2012-10-03 | 通用汽车环球科技运作有限责任公司 | Magnetic sensor system |
| CN105783689A (en) * | 2016-04-26 | 2016-07-20 | 高金 | Non-contact type magnetic force piezoelectric displacement sensor |
| CN106441064A (en) * | 2016-11-02 | 2017-02-22 | 广东百合医疗科技股份有限公司 | Method for measuring displacement through magnetic gap and equipment thereof |
| CN112161560A (en) * | 2020-10-26 | 2021-01-01 | 长江水利委员会长江科学院 | Displacement sensing device and method based on permanent magnet flux measurement |
-
2005
- 2005-05-27 CN CNA2005100402689A patent/CN1693837A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707245A (en) * | 2011-03-28 | 2012-10-03 | 通用汽车环球科技运作有限责任公司 | Magnetic sensor system |
| CN105783689A (en) * | 2016-04-26 | 2016-07-20 | 高金 | Non-contact type magnetic force piezoelectric displacement sensor |
| CN106441064A (en) * | 2016-11-02 | 2017-02-22 | 广东百合医疗科技股份有限公司 | Method for measuring displacement through magnetic gap and equipment thereof |
| CN106441064B (en) * | 2016-11-02 | 2020-01-31 | 广东百合医疗科技股份有限公司 | method and equipment for measuring displacement by magnetic seam |
| CN112161560A (en) * | 2020-10-26 | 2021-01-01 | 长江水利委员会长江科学院 | Displacement sensing device and method based on permanent magnet flux measurement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |